New used oil analysis for '08 sedan with SHELL syn 5w-20 and AC Delco PF 1233 oil ..

[Hershey]

filter . The AC Delco PF1233 oil filter was used for back to back oil intervals . Always use Toyota air filter . Oil and oil filter in use from 10/13/12 > 2/7/13 . There were 56,368 miles on the engine when sample was took . Previous oil was SHELL synthetic 5w-30 with the AC Delco filter . The SHELL is $3.33 a quart and the PF 1233 is $4 . Looks like a keeper .